{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x560446aae3ffaba82f6de96588cb66a3a2c6b36402c6b6d677603083cb03a46a",
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    "signer": "0x9F1EC68de222093e6254456C6Bb096D2bEa0A0Fa",
    "userId": "312260121"
  }
}